What happened: Christian Walker left Saturday's game with right hip tightness. Jeremy Peña exited the same contest with a right hamstring cramp.

Why it matters: Losing both players in the same game thins Houston's lineup as the Astros work to hold their edge in a tightening AL West race. Their statuses will factor into how manager plans the lineup card in the coming days.

What to watch: Watch for Houston's next lineup announcement and any update on Walker's hip and Peña's hamstring.